TM-9-2350-274-BD M109 Battlefield Damage Assessment and Repair Download
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TM 9-2350-274-BD ENGINE SECTION III. Engine Air Intake Systems 3-5. General. Turbocharged engines use exhaust gases to drive the turbocharger to compress air and force it into the cylinder under pressure. The engine air intake system therefore has vacuum and pressure. Repairs to turbocharged air intake systems must be done with materials that do not bIock the air flow. The materials must be securely attached to prevent them from being sucked into the system up to the turbocharger inlet. The repairs must seal so that the air pressure is maintained from the turbocharger outlet to the intake manifold. Care must be taken to keep the air induction system feeding the turbocharger in good condition. Air cleaners may become clogged with dirt and restrict the air flow causing loss of power and incomplete combustion indicated by excessive exhaust smoke. Clogged filters must be cleaned as soon as possible using compressed air, nitrogen, a dismounted blower motor or other air supply. Leaking or damaged air filters, housing or ducting will also cause damage by letting unfiltered air enter the engine causing dust ingestion damage. The dust will cause rapid wear of internal engine components and result in early engine failure. Leaking components can be repaired using tape, auto body filler, hose clamps and rags or any other similar materials available. 1. Air Cleaner Box - Left 2. Air Cleaner Box - Right 3. Air Inlet Ducts and Hoses 4. Screw, Lockwasher and Flatwasher 5. Support Bracket Figure 3-5. Engine Air Intake System. 3-7